Microsoft has never been known for quality products, from OneDrive to Teams to (new) Outlook to all of Azure, nobody actually
love their products.
And recent years it has been quantity over quality (for example, see Dynamics 365, it's just a bunch of acquisitions slapped together).
So what is Microsoft's most loved, most stable and highest quality product?
The Intellimouse was a near perfect price point of quality, reliability and correct ergonomics for me. I bought three or four of them and still have one around today. Kinect was an innovative product that set-up easy and worked as advertised.